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Acquisitions (Narrative) (Details) (USD $)
In Millions, except Per Share data, unless otherwise specified
 12 Months Ended 0 Months Ended 3 Months Ended
Dec. 27, 2014
Dec. 28, 2013
Dec. 29, 2012
Mar. 31, 2012
Jun. 16, 2012
Jun. 15, 2013
Business Acquisition [Line Items]            
Merger and integration charges $ 0us-gaap_BusinessCombinationIntegrationRelatedCosts $ 10us-gaap_BusinessCombinationIntegrationRelatedCosts $ 16us-gaap_BusinessCombinationIntegrationRelatedCosts      
Tingyi            
Business Acquisition [Line Items]            
Indirect equity interest percentage       5.00%pep_IndirectEquityInterestPercentage
/ us-gaap_BusinessAcquisitionAxis
= pep_TingyiMember		    
Call option for indirect equity percentage, maximum percentage         20.00%pep_CallOptionForIndirectEquityPercentage
/ us-gaap_BusinessAcquisitionAxis
= pep_TingyiMember		  
Merger and integration charges     150us-gaap_BusinessCombinationIntegrationRelatedCosts
/ us-gaap_BusinessAcquisitionAxis
= pep_TingyiMember		      
Merger and integration charges, after tax     176pep_MergerAndIntegrationChargesAfterTax
/ us-gaap_BusinessAcquisitionAxis
= pep_TingyiMember		      
Merger and integration charges, after-tax impact per share     $ 0.11pep_MergerAndIntegrationChargesImpactPerShareNetOfTaxes
/ us-gaap_BusinessAcquisitionAxis
= pep_TingyiMember		      
Subsidiary, Vietnam Bottling Operations            
Business Acquisition [Line Items]            
Gain (Loss) on Sale of Stock in Subsidiary, After-Tax           $ 137us-gaap_GainLossOnSaleOfBusiness
/ dei_LegalEntityAxis
= pep_SubsidiaryVietnamBottlingOperationsMember
Gain(loss) on sale of stock in subsidiary, after-tax per share           $ 0.09pep_Gainlossonsaleofstockinsubsidiaryaftertaxpershare
/ dei_LegalEntityAxis
= pep_SubsidiaryVietnamBottlingOperationsMember